Mijamin Priest wrote in his family bible:

Our Dear sons Henry & William were soldiers in the Confederate Army---fought the bloody battle at Fort Donelson. Were surrendered prisoners of War, February 16, 1862. Were conveyed to Camp Dunlop, (sic) near Chicago, Illinois, and there died. William on the 30th June 1862, aged 19 years, 6 mos. and 3 days. Henry on the 17 August 1862, aged 24 years, 4 mos., and 4 days---Willaim with the brain fever and Henry with typhoid fever.

7th Texas Infantry. Probably buried in the mass grave called Oak Woods Cemetery.

Mijamin wrote,

Away from their home and the friends of their youth
They died as they lived in belief of the truth
We mourn but not as those who have no hope
To God we commit them.

That would be a good epitaph.

BTW, Mijamin Priest (raised in Pennsylvania) was a local Texas judge, a slaveholder and well known for being a staunch Unionist, before, during and after the War. All four of his sons enlisted in the CSA.